CallMeMeryl

got it

Aah, OK I think the penny has dropped. So a bit like thrashing my car 0-60 in 3 seconds uses more fuel than if I slowly accelerate at a reasonable pace? Thank you

@SteamyTea Thank you for such a detailed explanation. I really appreciate it. I think I am going to leave all the settings as they are and accept that I have to change the way I use 'heating'.

So my OH suggested lowering the temperature we have set by 1 degree to see if it affects running costs. If I understand something from your comment would this mean that whilst we might see a saving for a very short time, whilst the house cooled down, as soon asASHP started to maintain the new temperature it would be back to using the same amount of power?

Guilty as charged!

I will settle for canoe mode I understand all you say and it makes sense. I feel confused by the installer and also the documentation that shows lovely weekly programming schedules with 6 different events in each day. Indeed the installer asked me what temperatures I would like at different times of the day and set the schedule accordingly. I soon found out this was nonsense, firstly when I got up to an icy cold bedroom in the morning! Have you any comment on the setting the installer changed right at the start? We are where we are, so I will console myself with the hope that I am at least cutting carbon emissions.

What a shame so much money is being invested in something that does not appear to work too well! My fault, I should have done my research rather than believe what I was told. One final question (and I realise it is annoying being asked basic questions by uninformed people, so thank you for replying): Is there any setting you are aware of that I can change to make it a bit more responsive? At the moment trying to effect a change in temperature is like trying to turn a supertanker. BTW, we live about 10 miles away from you looking at your blog. I am beginning to wish I had started from scratch.

Thank you, that was my logic. So, I will keep doing that.

My gas last Jan/Feb cost me approx £5 per day using 382 units (4210 kWh). My average daily electricity usage for this January using heat pump (but only fitted 22nd Jan) was 35kWh per day, and for February that came down to an average of 27 kWh per day. I have been keeping a simple spreadsheet of external temperature and heat pump settings in order to try and suss it out. So on the face of it it is averaging out but the difference is we are not as warm as we were even with settings on average 2 degrees higher than previously. The way the heat pump was 'sold' to use was that although electricity is dearer than gas, it would be much more efficient. Am I just misinformed do you think? My rationale was tat the gas boiler didn't have much life left in it and I was making a 'greener' choice by installing the heat pump.

I am hoping that all you knowledgeable people will be kind enough to help me out with advice. I do not have a technical bone in my body and am struggling with the ASHP I have just had installed. It is costing me a fortune! I have been scouring the net for help and came upon this site. I have of course approached the installer, and also Panasonic directly. I have also looked at the 'paperwork' from Panasonic but no further forward. I just need to know the best way to use it. The unit is a Panasonic WH-MXC12H6E5. Admittedly it was installed right before we had the snow this year. The installer kept referring to the curve (don't entirely understand but get the gist that these settings have something to do with performance/efficiency). When I displayed shock at how much it was costing me to run, the installer amended the curve from 55 to 45 @ -15 degrees, and 35 @+15 degrees. Does this make sense? The installer asked us what time settings we wanted so we started with warmer during the day and cooler at night (mimicing the old gas system ). But the trouble with this is the length of time it takes to effect a change of 1 degree - typically 5 hours! This is useless so I am currently keeping it at a steady temperature. We live in an Edwardian house but with double glazing, cavity fill and loft insulation in the south of England. We are running radiators, no UFH. We have TRV on the bedroom rads and most of these are turned down low as no children home at the moment. So specific questions: 1 What should the curve settings be ? 2 Should I alter temp throughout day/night or keep it on a constant heat? (I want to be warm at night but only to a point!) 3 Am I right to turn TRVs right down in unused rooms? I wasn't sure if to post a new thread or come on in this one , I am just hoping that members get new messages flagged up and someone will take pity on me. Thank you so much. The more I find out about ASHPs and my circumstances the whole situation is getting like the old joke about asking for directions someplace and being told "well I wouldn't start from here"!